What is a Time-Based One-Time Password? - Definition from WhatIs.com

Learn what a time-based one-time password is and how TOTPs can strengthen user authentication and limit successful social engineering attacks.
A time-based one-time password (TOTP) is a temporary passcode generated by an algorithm that uses the current time of day as one of its authentication factors.

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What is a Time-Based One-Time Password (TOTP)?

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What is a one-time password (OTP)? Definition from SearchSecurity